745398728541 has 12 divisors (see below), whose sum is σ = 1076884716700. Its totient is φ = 496841256000.

The previous prime is 745398728521. The next prime is 745398728549. The reversal of 745398728541 is 145827893547.

745398728541 is a `hidden beast` number, since 7 + 4 + 5 + 3 + 9 + 87 + 2 + 8 + 541 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 431972304516 + 313426424025 = 657246^2 + 559845^2 .

It is not a de Polignac number, because 745398728541 - 2⁷ = 745398728413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (745398728549) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7550710 + ... + 7648791.

Almost surely, 2^745398728541 is an apocalyptic number.

It is an amenable number.

745398728541 is a deficient number, since it is larger than the sum of its proper divisors (331485988159).

745398728541 is a wasteful number, since it uses less digits than its factorization.

745398728541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15204956 (or 15204953 counting only the distinct ones).

The product of its digits is 67737600, while the sum is 63.

The spelling of 745398728541 in words is "seven hundred forty-five billion, three hundred ninety-eight million, seven hundred twenty-eight thousand, five hundred forty-one".